174 



AGARICUS. 



Pleurotus. 4 in.) broad, fleshy, thin, unequal, silky-viHous, not hygrophanous. 

 Stem somewhat lateral, thin or obsolete, villous. Gills decurrent, 

 very crowded, thin, white, then becoming yellow. 



Tough. Allied to A. lignatilis. 



On plane and ash. Walthamstow, &c. 



Fr. Hym. Eur. p. 175. B. & Br. n. 2000. C. Illust. 



Name acer, maple. 

 PL 291. 



II. DlMIDIATI. 



377. A. petaloides Bull. Pileus 2.5-5 cent. (1-2 in.) long,/ky- 

 cous, becoming pale, dimidiate, fleshy, but in no wise compact, 



rather plane, somewhat spathulate, con- 

 tinuous with the stem and depressed 

 behind, hence the villous down of the 

 stem ascends to this point (the disc) 

 of the pileus, otherwise smooth, even, 

 margin at first involute, then expanded. 

 Stem about 12 mm. (*4 in.) long, some- 

 times however very short, solid, firm, 

 compressed, channelled when larger, 

 more or less villous, whitish. Gills 

 decurrent, very crowded, very narrow 

 (scarcely beyond 2 mm. broad), linear, 

 very unequal, white then cinereous. 



Taste bitter. The form on wood is some- 

 what horizontal, gregarious, here and there 

 imbricated. B. spathulatus Pers. Obs. i. /. 

 4. /. i, erect, growing on the ground. The 

 stem is channelled especially in the variety. 



It varies much even in colour ; the forms growing on the ground, which are 

 somewhat vertical with the margin reflexed, are especially remarkable, and 

 smaller specimens almost pass into A. tremulus. In one most remarkable 

 form the pileus is red : Lere in Pers. M. E. 3. t. 25. /. 6. 



On stumps and on the ground. Rare. 



Spores 8x4 mk. W. G.S. Name from fancied resemblance in shape to the 

 petal of a flower. Bull. t. 226, 557. /. 2. Fr. Monogr. i. p. 248. Hym. Eur. 

 p. 175. Berk. Out. p. 136. C. Hbk. n. 120. Illust. PL 258. a. Ventur. t. 

 44. /. 5 , 6. 



378. A. pulmonarius Fr. Pileus 5-7.5 cent. (2-3 in.) broad, 

 cinereous, continuous with the stem, fleshy, soft, but tough, flaccid, 

 obovate or reniform, plane or reflexo-conchate at the margin, even, 

 smoothj flesh thin, soft, white. Stem very short, solid, exactly 

 lateral, horizontal or ascending, round, villous, expanded into the 

 pileus. Gills decurrent but ending de terminate ly, moderately 



XI. Agaricus (Pleurotus) tnitis. 

 Natural size. Section three 

 times natural size. 



